Roof Moss Removal in Dayton: How to Get Moss Off Shingles Without Ruining the Roof
Kill it, don't scrape it. What works on asphalt shingles, what wrecks them, and what the roof looks like in the weeks after.
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Green clumps on the shady side of the roof usually get noticed in fall. The leaves come down, you're out looking up at the gutters, and there it is along the lower edge of the shingles.
I'm Anthony. A Team Contracting is family-owned out of Tipp City, and we soft wash roofs across the Miami Valley. Here's the straight version on moss: what it does to shingles, what not to do about it, and what the roof really looks like in the weeks after.
The short answer
Don't pressure wash or scrape roof moss. Both tear granules off the shingles. The safe way is a low-pressure soft wash that kills the moss, then time: dead moss loosens and weathers off over the following weeks. Moss is worth removing because it holds water and can lift shingle edges. In Dayton, call A Team at (937) 777-9093.
Is moss actually bad for your roof?
Yes, and more than streaks are. Moss holds water against your shingles and lichen roots into the surface.
The Asphalt Roofing Manufacturers Association (ARMA) says moss needs a moist spot to grow. Once it's established, it can make the leading edges of shingles lift or curl, which raises the risk of shingles blowing off in a wind storm. In severe cases, ARMA says, moss can push water sideways under the shingles and lead to moisture damage to the roof deck, or leaks.
Black streaks are a different problem. Those are algae, Gloeocapsa magma, and ARMA calls them mostly cosmetic. If your roof has dark vertical stains and no green clumps, read how to remove black streaks from a roof instead. Moss is the one worth getting off sooner.
Why moss grows where it does
Moss wants shade and damp. ARMA points to the same spots we see on roofs around here:
- North-facing slopes. They see less sun and stay damp longer.
- Sections under trees. Overhanging branches keep the roof shaded.
- Leaves and debris left on the roof. They sit there and hold moisture against the shingles.
- Lower roofs against a wall or under an upper roof. They stay shaded and catch runoff from above. ARMA advises not letting an upper roof's gutter drain straight onto a lower roof.
A lower roof section like this one, on a Beavercreek house, is a textbook spot. The wall above shades it, and it stays damp longer than the rest of the house. If your moss is all on one side or one low section, that's usually why.
What not to do: pressure washers, scrapers and wire brushes
Asphalt shingles are covered in mineral granules. Those granules are the shingle's UV protection. Force takes them off.
- No pressure washer. We never put a pressure washer on shingles. ARMA says the same: never pressure wash an asphalt shingle roof, because the granule loss can lead to the roof failing early.
- No scraping or pulling. Moss roots into the shingle surface. Scrape it or pull it by hand and the granules come off with it.
- No wire brush. Same problem as scraping, with more damage.
Then there's the ladder. A wet, treated roof is slick, and moss makes it worse. We stay off the roof surface wherever we can and work from ladders and the ground.
ARMA does publish a do-it-yourself method: a diluted bleach solution, dwell time, a low-pressure rinse, and plants protected. It's on their site if you want it. My honest take: the solution isn't the risky part. The ladder on a roof edge is.
How we remove moss from a shingle roof
- We assess pitch and material first. Shingle, metal, and heavily mossed roofs all get handled differently. We look before anything comes off the truck.
- We protect your plants and windows. Beds get wet down and covered before we start, and rinsed after.
- We apply low pressure and let it work. The solution does the cleaning, not force. It needs dwell time.
- We rinse and show you. Full rinse of the roof and everything below it, then before-and-after photos.
It's the same low-pressure method we use for all roof cleaning in Dayton, streaks or moss. If your roof is still under warranty, read about soft washing and your shingle warranty.
What to expect after: moss dies first, then weathers off
This is the part most people don't hear up front. Moss and lichen root into the shingle surface, so they often die first and weather off over the following weeks rather than disappearing the same afternoon. That's normal. It isn't a missed spot.
ARMA says the same: treated moss loosens over time and can be cleared off with a leaf blower. Heavy growth can take more than one treatment.
If you still see some moss up there after we leave, don't go up and pull at it. That's the granule problem all over again. Let it loosen.
Keeping moss off (and why fall is the time to do it)
From ARMA's list, these are the ones that matter most:
- Trim branches back so the roof gets sun.
- Clear leaves and debris off the roof regularly, with a non-abrasive method.
- Keep the gutters clean so water drains off the roof edge. See when to clean gutters in fall.
Zinc strips? GAF's own zinc strip instructions say zinc slows new growth but doesn't remove moss that's already there. ARMA doesn't recommend adding zinc or copper strips to an existing roof, because of exposed nails or a broken shingle seal. They're an option when a roof gets replaced.
Fall is when leaves pile up on the roof and fill the gutters, so it's a good time to do both together. Here's how roof and gutter cleaning in one visit works:
Fall roof + gutter offer
Roof clean and sealcoat, with free gutter cleaning, for $1,500 on an average two-plane roof. It adds 5+ years of life to the roof. Larger or complex roofs are quoted separately. Details on the $1,500 roof and gutter bundle.
The sealcoat needs a 50°F+ day and a 24–48 hour cure. The wash itself only needs it not to be frozen. The sealer is the same clear, water-based acrylic we use on concrete, $2 per square foot flat, and it leaves a protective, water-resistant layer. See seal coating.
What roof moss removal costs
Roof washes start at $499. Snap a photo of the mossy side of the roof or call (937) 777-9093 for your price. Size, pitch, how much growth is on it, the material, and access around the house all move the number from there, so I'd rather see your roof than guess at it.
If the gutters need doing too, gutter cleaning is free with any roof wash, sealcoat or not. The $1,500 roof clean and sealcoat on an average two-plane roof includes it too. Gutter cleaning on its own runs $100–$200 for a one- or two-story home.
Book a roof moss removal in Dayton
Snap a pic of the mossy side of the roof. I'll tell you what it needs. Send it here, or call or text me at (937) 777-9093. Ask about the $1,500 roof clean and sealcoat with free gutter cleaning while you're at it.
Book it as roof cleaning in Dayton. We also clean roofs in Tipp City, Huber Heights, Beavercreek, Fairborn and Vandalia.
Frequently Asked
The moss questions we get every fall.
Snap a Pic of the Mossy Side
I'll tell you what it needs. Ask about the $1,500 roof clean and sealcoat with free gutter cleaning.
📸 Snap a Pic. Get a Price → or call (937) 777-9093